Portable soil quality multi-parameter in-situ detection device

Abstract

The utility model relates to the technical field of soil in-situ detection, and discloses a portable soil quality multi-parameter in-situ detection device. The device mainly comprises a controller, a connecting wire, an optical probe and a sensor. The controller is provided with a touch screen, a single-chip microcomputer circuit board, a single-chip microcomputer, an SD card, a key switch, a wireless communication control panel and a power source, and power source management, detection system control, real-time data processing, man-machine interaction, data storage and remote transmission can be achieved. The sensor comprises a soil temperature probe, a soil humidity probe, a soil conductivity probe and a soil pH probe, and can realize real-time data acquisition of soil temperature and humidity, conductivity and pH value; an annular lamp holder, a light source, a photoelectric sensor, a plano-convex lens, a light shielding plate, a light shielding boss and a light shielding ring are arranged in the optical probe, and rapid collection of soil organic matter spectrum information can be achieved. The soil in-situ detection device realizes synchronous acquisition of multiple parameters of soil, is reasonable in structural design and convenient to operate, and is suitable for popularization and application in the field of soil in-situ detection.

Description

Technical Field

[0001] The utility model relates to the technical field of in-situ soil detection, in particular to a portable multi-parameter in-situ detection device for soil quality. Background Art

[0002] Soil quality parameters play an important guiding and reference role in evaluating the quality of soil. Soil temperature and humidity, conductivity, pH value and organic matter content all have important impacts on planting operations.

[0003] Traditional methods for in-situ detection of soil temperature and humidity, conductivity and pH value mostly use temperature and humidity, conductivity and pH sensors, and communicate serially with terminals such as computers through peripheral interfaces. The returned hexadecimal data needs to be processed through effective information extraction and decimal conversion to obtain common quantitative values. Such methods have relatively high professional requirements for operators, and the detection equipment is complex and heavy, and cannot achieve long-term real-time detection, and cannot meet the requirements of field operations and popularity.

[0004] Traditional methods for measuring soil organic matter content include potassium dichromate volumetric method, dry combustion method, etc. These chemical methods not only require a large amount of soil samples to be collected in the field, but also need to bring the samples to the laboratory for air drying, grinding, sieving and then carry out chemical analysis. They generally have the disadvantages of complex operation, long time consumption and high cost, and cannot meet the requirements of rapid and low-cost detection in modern agriculture.

[0005] Therefore, a portable multi-parameter in-situ detection device for soil quality is proposed in this application. Summary of the Invention

[0006] In view of the above-mentioned defects and deficiencies of the prior art, the purpose of the utility model is to provide a portable multi-parameter in-situ detection device for soil quality to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A portable multi-parameter in-situ detection device for soil quality, characterized in that it includes a controller, a connecting wire, an optical probe and a sensor. The controller is provided with a touch screen, an SD card, a single-chip microcomputer circuit board, a single-chip microcomputer, a light source driving board, a wireless communication control board, a power supply and a key switch. The optical probe internally has a photoelectric sensor, a light-blocking boss, a light-shielding plate, an annular lamp holder, a light source, a plano-convex lens and a light-blocking ring. The light source is installed on the annular lamp holder, the photoelectric sensor is installed above the light-blocking boss, the plano-convex lens is fixed at the bottom of the optical probe, the light-shielding plate and the light-blocking boss are used to prevent the light source from directly irradiating the surface of the photoelectric sensor, the light-blocking ring is used to prevent natural light interference, the sensor and the optical probe are connected to the controller through a connecting wire, the optical probe realizes the acquisition of soil organic matter content data, the sensor realizes the acquisition of soil temperature and humidity, pH and conductivity data, the single-chip microcomputer is used to control the system operation and data operation, the wireless communication control board can transmit the measurement data to wireless terminals such as mobile phones, the SD card is used to store the measurement data, the key switch is respectively used to control the power on / off and system reset, and the touch screen can realize human-computer interaction.

[0009] Preferably, the wireless control board includes a wireless communication module and a power control module, and the wireless communication module transmits data to the wireless terminal through the LoRa wireless transmission protocol.

[0010] Preferably, the single-chip microcomputer circuit board includes a single-chip microcomputer control circuit, a power management circuit, an A / D conversion circuit, an RS485 communication circuit, a filtering circuit, a rectifying circuit, an SD card data reading and writing circuit, a touch screen driving circuit and a light source driving circuit, and can be powered by a lithium battery or directly powered through a USB expansion port.

[0011] Preferably, the single-chip microcomputer model is STM32F103VCT6, which is used to control the system operation and process data, the SD card is an 8GB memory card, which is used to store data information, the power supply is a 20000mA lithium battery, and it can be charged through a reserved USB charging port.

[0012] The portable multi-parameter in-situ detection device for soil quality described in the present utility model has the following beneficial effects:

[0013] The utility model adopts a portable packaging design, which can detect soil temperature and humidity, conductivity, pH value and organic matter content simultaneously, and is suitable for field operations; it adopts a multi-power supply mode for users to choose, which can be powered by a lithium battery or externally powered through a USB serial port; the soil parameters can be visually read through a touch screen, and the data collected by the sensor and the optical probe can be directly converted, with convenient operation; the data is stored in the SD card through human-computer interaction for subsequent processing; based on the LoRa wireless transmission protocol, the data is wirelessly transmitted to the terminal device, and long-term in-situ detection and real-time data monitoring of the device can be realized. Brief Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a portable multi-parameter in-situ detection device for soil quality of the utility model.

[0015] Figure 2 It is a schematic structural diagram of the internal components of the controller.

[0016] Figure 3 It is a schematic internal structure diagram of the optical probe.

[0017] Figure number identification: 1. Controller; 2. Connecting wire; 3. Optical probe; 4. Sensor; 5. Touch screen; 6. SD card; 7. Microcontroller circuit board; 8. Microcontroller; 9. Wireless communication control board; 10. Power supply; 11. Controller housing; 12. Button switch, 13. Probe housing; 14. Photoelectric sensor; 15. Light blocking boss; 16. Light blocking plate; 17. Ring lamp holder; 18. Light source; 19; Planoconvex lens; 20. Light blocking aperture. Specific Embodiments

[0018] To make the purpose, technical solutions and advantages of the utility model clearer and more understandable, the following further explains the utility model in combination with the given specification drawings and specific embodiments. For the components not described in detail in the utility model or the connection relationship between components, the prior art is adopted. It should be understood that these descriptions are only applicable to explaining the utility model and are not used to limit the utility model.

[0019] The following further explains the technical solutions of the present invention in combination with the drawings and embodiments.

[0020] A portable multi-parameter in-situ detection device for soil quality, characterized in that it includes a controller 1, a connecting wire 2, an optical probe 3 and a sensor 4. The controller is provided with a touch screen 5, an SD card 6, a single-chip microcomputer circuit board 7, a single-chip microcomputer 8, a wireless communication control board 9, a power supply 10 and a key switch 12. Inside the optical probe, there are a photoelectric sensor 14, a light-blocking boss 15, a light-shielding plate 16, an annular lamp holder 17, a light source 18, a plano-convex lens 19 and a light-blocking ring 20. The light source 18 is installed on the annular lamp holder 17, the photoelectric sensor 14 is installed above the light-blocking boss 15, the plano-convex lens 19 is fixed at the bottom of the optical probe 3, the light-shielding plate 16 and the light-blocking boss 15 are used to prevent the light source 18 from directly irradiating the surface of the photoelectric sensor 14, and the light-blocking ring 20 is used to prevent natural light interference. The sensor 4 and the optical probe 3 are connected to the controller 1 through the connecting wire 2. The optical probe 3 is used to collect data on the soil organic matter content, and the sensor 4 is used to collect data on soil temperature, humidity, pH and conductivity. The single-chip microcomputer 8 is used to control the system operation and data calculation. The wireless communication control board 9 can transmit the measured data to wireless terminals such as mobile phones. The SD card 6 is used to store the measured data. The key switch 12 is respectively used to control the power on / off and system reset, and the touch screen 5 can achieve human-computer interaction.

[0021] The sensor 4 communicates with the single-chip microcomputer through a sensor lead and an RS485 interface. The sensor 4 includes a soil temperature probe, a soil humidity probe, a soil conductivity probe and a soil pH probe, and can simultaneously detect multiple soil parameters.

[0022] The optical probe 3 communicates with the single-chip microcomputer through an optical probe lead and an A / D conversion interface. On the annular lamp holder 17 inside the optical probe 3, the lamp holes are evenly distributed in a circle at a 45-degree angle, ensuring that the light-emitting axis of the light source is concentrated at one point. The light source 18 is 8 visible near-infrared single-wavelength LED lamp beads, and the light of a specific wavelength is sequentially irradiated on the soil surface through the lamp holes. The photoelectric sensor 14 sequentially receives the light signals diffusely reflected by the soil, converts the light signals into voltage signals, and transmits them to the single-chip microcomputer 8 through the optical probe lead and the A / D conversion interface, so as to obtain the reflectivity of the soil organic matter at a specific wavelength.

[0023] The single-chip microcomputer circuit board 7, the single-chip microcomputer 8, the SD card 6, the wireless communication control board 9 and the power supply 10 are all encapsulated in the controller 1. The single-chip microcomputer circuit board 7 controls the power on / off of the circuit and the reset of the single-chip microcomputer system through the external key switch 12.

[0024] The single-chip microcomputer circuit board 7 includes a single-chip microcomputer control circuit, a power management circuit, an A / D conversion circuit, an RS485 communication circuit, a filtering circuit, a rectifying circuit, an SD card data reading and writing circuit, a touch screen driving circuit, and a light source driving circuit, and can be powered by a lithium battery or directly powered through a USB expansion port.

[0025] The single-chip microcomputer 8 is of the model STM32F103VCT6 and is used to control the system operation and process data. The SD card 6 is an 8GB memory card and is used to store data information. The power supply 10 is a 20000mA lithium battery and can be charged through a reserved USB charging port.

[0026] The utility model adopts a portable package design, can simultaneously detect soil temperature and humidity, conductivity, pH value and organic matter content, and is suitable for field work; adopts a multi-power supply mode for users to choose, can either use a lithium battery for power supply or achieve external power supply through a USB serial port; realizes the visual reading of soil parameters through a touch screen, can directly convert the data collected by sensors and optical probes, and is convenient to operate; stores data into the SD card through human-computer interaction, which is convenient for subsequent processing; based on the LoRa wireless transmission protocol, wirelessly transmits data to a terminal device, and can realize the long-term in-situ detection and real-time data monitoring of the device.

[0027] The above has shown and described the basic principles, main features and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, in any regard, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0028] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments understandable to those skilled in the art.

Claims

1. A portable soil quality multi-parameter in-situ detection device, characterized by: The invention comprises a controller, a connecting line, an optical probe and a sensor. The controller is provided with a touch screen, an SD card, a single-chip microcomputer circuit board, a single-chip microcomputer, a wireless communication control board, a power supply and a key switch. The interior of the optical probe is provided with a photoelectric sensor, a light-blocking boss, a light shielding plate, an annular light stand, a light source, a plano-convex lens and an aperture. The light source is installed on the annular light stand, the photoelectric sensor is installed above the light-blocking boss, the plano-convex lens is fixed to the bottom of the optical probe, the light shielding plate and the light-blocking boss are used to prevent the light source from directly irradiating the surface of the photoelectric sensor, and the aperture is used to prevent interference from natural light. The sensor and the optical probe are connected to the controller via a connecting line. The optical probe realizes data collection of soil organic matter content, and the sensor realizes data collection of soil temperature, humidity, pH and conductivity. The single-chip microcomputer is used to control system operation and data calculation. The wireless communication control board can transmit measurement data to a mobile phone. The SD card is used to store measurement data. The key switch is used to control power on and off and system reset respectively. The touch screen can realize human-computer interaction.

2. A portable soil quality multi-parameter in-situ detection device according to claim 1, characterized in that: The sensor communicates with the single-chip microcomputer via a sensor lead and an RS485 interface. The sensor includes a soil temperature probe, a soil moisture probe, a soil conductivity probe, and a soil pH probe, and can simultaneously detect multiple soil parameters.

3. A portable soil quality multi-parameter in-situ detection device according to claim 1, characterized in that: The optical probe communicates with the single-chip microcomputer through the optical probe lead and the A / D conversion interface. The annular lamp holder inside the optical probe has lamp holes distributed in a circle at a 45-degree angle, ensuring that the light axis of the light source is concentrated at one point. The light source is a single-wavelength LED lamp bead, which irradiates the soil surface with light of a specific wavelength through the lamp holes in sequence.

4. A portable soil quality multi-parameter in-situ detection device according to claim 1, characterized in that: The single-chip microcomputer circuit board, single-chip microcomputer, SD card, wireless communication control board and power supply are all encapsulated in the controller. The single-chip microcomputer circuit board controls the power supply of the circuit and resets the single-chip microcomputer system through an external key switch.

5. The portable soil quality multi-parameter in-situ detection device according to claim 1, characterized in that: The single-chip microcomputer circuit board includes a single-chip microcomputer control circuit, a power management circuit, an A / D conversion circuit, an RS485 communication circuit, a filtering circuit, a rectifier circuit, an SD card data reading and writing circuit, a touch screen driving circuit and a light source driving circuit. It can be powered by a lithium battery or directly by a USB expansion port.

6. The portable soil quality multi-parameter in-situ detection device according to claim 1, characterized in that: The single chip microcomputer model is STM32F103VCT6, which is used to control system operation and process data. The SD card is an 8GB memory card for storing data information. The power supply is a 20000mA lithium battery and can be charged through a reserved USB charging port.

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